US5984315A - Reclamation system for a hydraulic pump system - Google Patents

Reclamation system for a hydraulic pump system Download PDF

Info

Publication number
US5984315A
US5984315A US08/727,940 US72794096A US5984315A US 5984315 A US5984315 A US 5984315A US 72794096 A US72794096 A US 72794096A US 5984315 A US5984315 A US 5984315A
Authority
US
United States
Prior art keywords
fluid
pump
leakage
eductor
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/727,940
Other languages
English (en)
Inventor
Michele Lee Burkhardt
Jack W. Wilcox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanxess Canada Co
Denison Hydraulics Inc
Original Assignee
Denison Hydraulics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denison Hydraulics Inc filed Critical Denison Hydraulics Inc
Priority to US08/727,940 priority Critical patent/US5984315A/en
Assigned to DENISON HYDRAULICS INC. reassignment DENISON HYDRAULICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BURKHARDT, MICHELE LEE, WILCOX, JACK W.
Priority to CA002217302A priority patent/CA2217302A1/fr
Priority to EP97630065A priority patent/EP0836005A1/fr
Priority to AU39969/97A priority patent/AU714466B2/en
Priority to JP9293621A priority patent/JPH10184555A/ja
Assigned to UNIROYAL CHEMICAL CO./UNIROYAL CHEMICAL CLE. reassignment UNIROYAL CHEMICAL CO./UNIROYAL CHEMICAL CLE. MERGER AND CHANGE OF NAME Assignors: UNIROYAL CHEMICAL LTD./UNIROYAL CHEMICAL LTEE.
Application granted granted Critical
Publication of US5984315A publication Critical patent/US5984315A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/04—Draining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/928—Seal including pressure relief or vent feature

Definitions

  • This invention relates generally to hydraulic pumps, and particularly concerns a servo-controlled hydraulic pump system having an eductor element combined with its servo-control loop in a novel manner that functions to reclaim hydraulic fluid otherwise undesireably leaked from within the pump.
  • the present invention as applied to a known variable-volume type of hydraulic pump, is basically comprised of the system servoloop pump, a miniature eductor element, an additional and spacedapart shaft seal element, and fluid lines functionally connecting an auxiliary pump outlet to the eductor element pressurized fluid inlet, functionally connecting the zone intermediate the shaft seals to the eductor element leakage fluid inlet, and functionally connecting the eductor element fluid outlet to the pump system hydraulic fluid sump or reservoir.
  • a suitable check valve may be advantageously provided in the fluid line connecting the zone intermediate the shaft seals to the eductor element leakage fluid inlet.
  • FIG. 1 is side elevation view of a representative servo-controlled hydraulic pump system but having a preferred embodiment of the leakage reclamation sub-system of the present invention incorporated therein;
  • FIG. 2 is a schematic sectioned view of the miniature eductor element incorporated in the leakage reclamation sub-system of the FIG. 1 hydraulic pump system;
  • FIG. 3 is a sectioned illustration taken at line 3--3 of FIG. 1;
  • FIG. 4 is a schematic illustration of the functional relationship of the leakage reclamation sub-system components incorporated in the FIG. 1 hydraulic pump system.
  • FIG. 1 of the drawings we illustrate a representative hydraulic pump system 10 having a preferred embodiment of the leakage reclamation sub-system of the present invention incorporated therein.
  • Pump system 10 includes a drive shaft element 12 which typically is connected to an electric motor or other motive power source, a pressurized hydraulic fluid outlet port 14, an auxiliary pump which may be a servo hydraulic fluid pump (not shown), and a case or housing drain port 16 that communicates with a conventional hydraulic fluid reservoir.
  • the auxiliary pump may be a supercharge pump, a separately attached pump or any device providing a source of pressure fluid.
  • Hydraulic pump system 10 often is a variable volume type of hydraulic pump system in which piston stroke displacements are varied in response to control inputs received from the included pump system servo control loop.
  • system 10 also typically includes an integral end mount 18, a conventional, primary or lip-type oil seal element 20 positioned in the end mount in surrounding relation to drive shaft 12 and in proximity to the spherical roller bearing assembly 22 provided for the support of drive shaft 12, and a conventional, secondary or dry-type air seal element 24, also surrounding drive shaft 12 but spaced apart from oil seal element 20.
  • a conventional, primary or lip-type oil seal element 20 positioned in the end mount in surrounding relation to drive shaft 12 and in proximity to the spherical roller bearing assembly 22 provided for the support of drive shaft 12, and a conventional, secondary or dry-type air seal element 24, also surrounding drive shaft 12 but spaced apart from oil seal element 20.
  • the conventional hydraulic pump system is mounted vertically with the air seal positioned uppermost, and even though the conventional oil and air seal dual seal arrangement may be utilized, substantial hydraulic fluid leakage may be experienced over prolonged periods of pump system operation. Accordingly, and to remedy such problem, we provide additional components in system 10 to effectively reclaim leakage fluid from between seal elements 20 and 24 prior to its escape to
  • the principal components of the leakage reclamation sub-system include: a "miniature" conventional eductor element 30 having an eductor pressurized fluid inlet port 32, an eductor leakage fluid inlet port 34, and an eductor outlet port 36 in addition to an eductor venturi throat 38; a fluid line 40 connected to pressurized hydraulic fluid outlet port 14 of a servo-control loop which acts as an auxiliary pump fluid source and to eductor inlet port 32; a fluid line 42 connecting eductor leakage fluid inlet port 34 to leakage fluid collection zone 44 situated in end mount 18 essentially between spaced-apart oil and air seals elements 20 and 24; and a fluid line 46 connecting eductor outlet 36 to case drain 16 in fluid flow relation.
  • check valve element 48 in the leakage reclamation sub-system in fluid line 42. It should be noted that when incorporating the leakage reclamation sub-system into hydraulic pump system 10, that, in addition to creating the vacuum leakage collection zone 44 in end mount 18, we prefer that air seal 24 be a lip-type seal.
  • FIG. 4 A schematic diagram of the leakage fluid reclamation sub-system incorporated into hydraulic pump system 10 is provided in FIG. 4.
  • one actual embodiment of the sub-system utilizes a fluid flow of approximately 0.5 gallons per minute from a servo-loop fluid pump at a pressure in the range of from approximately 400 pounds per square inch to approximately 500 pounds per square inch.
  • the incorporated "mini-eductor" functions well so long as the pump system case drain pressure is below approximately 40 pounds per square inch. If the case drain pressure exceeds that value, eductor element 30 no longer develops the desired vacuum condition in collection zone 44.
  • Check valve 48 preferably has an O-ring seat and is provided to prevent any back flow of leakage fluid during system shut-down and during periods of excessively high case drain pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US08/727,940 1996-10-09 1996-10-09 Reclamation system for a hydraulic pump system Expired - Fee Related US5984315A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US08/727,940 US5984315A (en) 1996-10-09 1996-10-09 Reclamation system for a hydraulic pump system
CA002217302A CA2217302A1 (fr) 1996-10-09 1997-10-02 Pompe hydraulique a circuit de recuperation de fluide
EP97630065A EP0836005A1 (fr) 1996-10-09 1997-10-03 Système de récupération pour un système de pompe hydraulique
AU39969/97A AU714466B2 (en) 1996-10-09 1997-10-07 Reclamation system for a hydraulic pump system
JP9293621A JPH10184555A (ja) 1996-10-09 1997-10-09 液体ポンプ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/727,940 US5984315A (en) 1996-10-09 1996-10-09 Reclamation system for a hydraulic pump system

Publications (1)

Publication Number Publication Date
US5984315A true US5984315A (en) 1999-11-16

Family

ID=24924733

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/727,940 Expired - Fee Related US5984315A (en) 1996-10-09 1996-10-09 Reclamation system for a hydraulic pump system

Country Status (5)

Country Link
US (1) US5984315A (fr)
EP (1) EP0836005A1 (fr)
JP (1) JPH10184555A (fr)
AU (1) AU714466B2 (fr)
CA (1) CA2217302A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040160013A1 (en) * 2002-06-11 2004-08-19 Leclair James M. Vented high pressure shaft seal
US20110254231A1 (en) * 2010-04-19 2011-10-20 Isenberg Timothy J Clean-In-Place Seal Assembly
US20130039611A1 (en) * 2010-04-23 2013-02-14 Imo Holding Gmbh Sealing assembly for a rolling bearing
US10948375B2 (en) * 2017-09-20 2021-03-16 Grundfos Holding A/S Pump seal leakage detection system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19921501C2 (de) * 1999-05-07 2003-05-08 Brueninghaus Hydromatik Gmbh Hydraulische Maschine mit einem außenseitig von einem Wälzlager angeordneten Dichtelement
DE102006038073A1 (de) * 2006-08-16 2008-02-21 Robert Bosch Gmbh Kolbenmaschineneinheit mit einer hydrostatischen Kolbenmaschine und einer Hilfspumpe
DE102014106583A1 (de) 2014-05-09 2015-11-12 Rolls-Royce Deutschland Ltd & Co Kg Vorrichtung eines Flugtriebwerkes zum Abscheiden von Öl aus einem Luft-Öl-Volumenstrom

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722624A (en) * 1971-06-07 1973-03-27 Gen Electric Bearing seal and oil tank ventilation system
US4136886A (en) * 1977-02-25 1979-01-30 Alfa-Laval Ab Arrangement for cleaning a sealing ring on a shaft
US4504056A (en) * 1981-10-13 1985-03-12 Tomy Kogyo Co., Inc. Toy having playing surface with rotating member located thereon
US4621981A (en) * 1982-11-01 1986-11-11 Borg-Warner Corporation Pump improvement
US5173019A (en) * 1991-08-05 1992-12-22 American Gage And Machine Company Pump including secondary containment with alarm system
US5516119A (en) * 1994-02-08 1996-05-14 Environmental Seals & Services, Inc. Vapor containment and recirculation device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909878C2 (de) * 1979-03-14 1982-12-23 Carl Schenck Ag, 6100 Darmstadt Vorrichtung zur Abführung des Leckflusses eines hydraulischen Lagermediums
US4821981A (en) * 1985-10-08 1989-04-18 The Boeing Company Maneuver enchancement and gust alleviation system
US5419130A (en) * 1991-08-28 1995-05-30 Hydromatik Gmbh Hydrostatic machine with drain oil discharge
DE4128615C1 (fr) * 1991-08-28 1993-01-14 Hydromatik Gmbh, 7915 Elchingen, De
DE9206567U1 (de) * 1992-05-14 1992-07-30 Walter Voss GmbH Armaturenfabrik, 4322 Sprockhövel Axialkolbenpumpe
EP0661450A1 (fr) * 1993-12-06 1995-07-05 Vickers Incorporated Dispositif transformateur d'énergie d'un fluide à mouvement rotatoire avec un joint d'arbre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722624A (en) * 1971-06-07 1973-03-27 Gen Electric Bearing seal and oil tank ventilation system
US4136886A (en) * 1977-02-25 1979-01-30 Alfa-Laval Ab Arrangement for cleaning a sealing ring on a shaft
US4504056A (en) * 1981-10-13 1985-03-12 Tomy Kogyo Co., Inc. Toy having playing surface with rotating member located thereon
US4621981A (en) * 1982-11-01 1986-11-11 Borg-Warner Corporation Pump improvement
US5173019A (en) * 1991-08-05 1992-12-22 American Gage And Machine Company Pump including secondary containment with alarm system
US5516119A (en) * 1994-02-08 1996-05-14 Environmental Seals & Services, Inc. Vapor containment and recirculation device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040160013A1 (en) * 2002-06-11 2004-08-19 Leclair James M. Vented high pressure shaft seal
US7125020B2 (en) * 2002-06-11 2006-10-24 Eaton Corporation Vented high pressure shaft seal
US20110254231A1 (en) * 2010-04-19 2011-10-20 Isenberg Timothy J Clean-In-Place Seal Assembly
US20130039611A1 (en) * 2010-04-23 2013-02-14 Imo Holding Gmbh Sealing assembly for a rolling bearing
US10948375B2 (en) * 2017-09-20 2021-03-16 Grundfos Holding A/S Pump seal leakage detection system

Also Published As

Publication number Publication date
JPH10184555A (ja) 1998-07-14
AU3996997A (en) 1998-04-23
CA2217302A1 (fr) 1998-04-09
AU714466B2 (en) 2000-01-06
EP0836005A1 (fr) 1998-04-15

Similar Documents

Publication Publication Date Title
US4245844A (en) Apparatus for removing leakage flow of a pressurized medium from gap type seals
US4052852A (en) Constant pressure sealed fluid storage tank for hydraulic systems
US4527580A (en) Volume control device
ES2075412T3 (es) Dispositivo para controlar motores hidraulicos.
EP0775264B1 (fr) Dispositif de purification de fluide pour systemes hydrauliques
US5984315A (en) Reclamation system for a hydraulic pump system
GB2061414A (en) Sealing arrangements for piston pumps
EP0011903B1 (fr) Pompe hydraulique
EP1555468A1 (fr) Soupape de surete
JPH05141365A (ja) 流体圧装置
US6637551B2 (en) Check ball filter for transmissions
FI107075B (fi) Hydraulimoottorin vuotoöljyn palautuslaite
GB2183294A (en) Regulating device in a cooling or heat pump system
US5236317A (en) Gear pump valving system
CN220470094U (zh) 一种多级防回流式燃油滤清器
KR960704161A (ko) 가스 밸러스트 장치를 갖춘 진공 펌프(vacuum pump with a cas ballast device)
EP1062086B1 (fr) Systeme hydraulique destine a une presse
EP0162434A3 (fr) Dispositif prévenant l'aspiration retour pour ompes à piston rotatif
SU1634834A1 (ru) Узел уплотнени вала центробежного насоса
CA2126262A1 (fr) Dispositif de circulation d'eau de refroidissement a presse-etoupe monte sur l'arbre d'entrainement et mu par la roue de la pompe
US3256822A (en) Pneumatic sump pump with automatic operating control
SU1250726A1 (ru) Насосный агрегат
EP0992712A3 (fr) Soupape de régulation de pression pour une transmission avec convertisseur de couple
CN1196447A (zh) 双向柱塞泵
JP2003214362A (ja) 両回転式ベーンポンプ装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: DENISON HYDRAULICS INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BURKHARDT, MICHELE LEE;WILCOX, JACK W.;REEL/FRAME:008279/0383

Effective date: 19961002

AS Assignment

Owner name: UNIROYAL CHEMICAL CO./UNIROYAL CHEMICAL CLE., CANA

Free format text: MERGER AND CHANGE OF NAME;ASSIGNOR:UNIROYAL CHEMICAL LTD./UNIROYAL CHEMICAL LTEE.;REEL/FRAME:009996/0829

Effective date: 19971222

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20031116

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362